package com.ls.pattern.structure.facade;

//投影仪
public class Projector {
    private static Projector projector = new Projector();


    private Projector() {
    }

    public static Projector getInstance() {
        return projector;
    }

    public void on() {
        System.out.println(" projector on ");
    }

    public void off() {
        System.out.println(" projector off ");
    }

    //投射
    public void focus() {
        System.out.println(" projector focus ");
    }
}
